core[patch]: remove redundant imports (#28861)

`Graph` has been imported at Line: 62

libs/core/langchain_core/runnables/base.py

@@ -534,8 +534,6 @@ class Runnable(Generic[Input, Output], ABC):
 
     def get_graph(self, config: Optional[RunnableConfig] = None) -> Graph:
         """Return a graph representation of this Runnable."""
-        from langchain_core.runnables.graph import Graph
-
         graph = Graph()
         try:
             input_node = graph.add_node(self.get_input_schema(config))

libs/core/langchain_core/utils/pydantic.py

@@ -279,7 +279,7 @@ def _create_subset_model_v2(
     fn_description: Optional[str] = None,
 ) -> type[pydantic.BaseModel]:
     """Create a pydantic model with a subset of the model fields."""
-    from pydantic import ConfigDict, create_model
+    from pydantic import create_model
     from pydantic.fields import FieldInfo
 
     descriptions_ = descriptions or {}